Improvement in locks for sliding doors



n. H. DUTTERER. Lucksvfur Sliding Doors No.lf54,463.

Patented Aug. 25,1874.

UNITED STATES PATENT OFFICE.

DAVIS H. DOTTERER, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN LOCKS FOR SLIDING DOORS.

Specification forming part of Letters Patent No. 154.463. dated August25, 1874; application filed July 8, 1874. i

OAsE G.

To all 'whom it may concern Be it known that 1,1),Avrs H. DOTTEREE, ofPhiladelphia, in the county of Philadelphia and State of Pennsylvania,have invented certain new and useful Improvements in Locks for SlidingDoors; `and I do `hereby declare the following to be a full, olea-r, andexact description ofthe invention, such as will enable vothers skilledin the art to which it pertains to make and use it, reference being hadto the accompanying draWings,-Whicl1 formpart of this specification, inwhich- Figure 1 is a front view, land Fig. 2 a vertical transversesection, of my invention.

My invention has relation to certain improvements on the subject of mypatent of 1 April 14, 1874; and has for its object to so modify the.construction of the devices therein shown as to adapt the lock to asuspended door rolling upon an upper rail, and, consequently, notrequiring a combined'lock and carriage.

My present invention, accordingly, consists, irst, in the combination,with a notched guard,7 embracing the outer lower edge of a sliding door,of a lock, locking into said guard, and having a face-plate extension orhook depending and embracing said guard; secondly, in the constructionof a freight-car door-guard with a bead for the engagement of thelockhook.

Referring to' the accompanying drawing, A

represents a freight-car door, suspended from, and moving upon, an upperrail, B, by means of hangers and rollers C C. D represents the guardfastened to the sill of the car, and E the lock attached to the door A.D shows a horizontal rib or bead on the guard, and d d notches in theupper'edge of the same. The hook e on the lock engages with the rib D onthe guard, or it may be extended to embrace the lower edge thereof. Apivoted spring-latch within the lock E enters the notches cl and d. Whenit enters the former the door is completely-closed, but when it entersthe latter the door is locked in a partially open position for thepurpose of ventilation.

1. The combination, with a notched freightcar guard, embracing the lowerouter edge of a sliding door, of a lock, locking into said guard, andhaving a depending hook embracing the latter, substantially as shown anddescribed, for the purpose specified.

2. The guard D, having a bead, D', for the engagement of the lock-hook,substantially as and for the purpose shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this29th day of J une, 1874.

DAVIS H. DOTTERER.

Witnesses:

M. DANL. CONNOLLY, JNO. A. BELL.

